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| author | Poul-Henning Kamp <phk@FreeBSD.org> | 2004-10-01 06:33:39 +0000 |
|---|---|---|
| committer | Poul-Henning Kamp <phk@FreeBSD.org> | 2004-10-01 06:33:39 +0000 |
| commit | ba2851254fea6c4aa291ea1b761340e3cd820008 (patch) | |
| tree | ad89d4adcffc9a9b262d61d0ea417f468fc719ed /sys/kern/kern_conf.c | |
| parent | 000d5e07e0f5f1a26a2a6c642774dc6b83540791 (diff) | |
| download | src-ba2851254fea6c4aa291ea1b761340e3cd820008.tar.gz src-ba2851254fea6c4aa291ea1b761340e3cd820008.zip | |
Fix a LOR relating to freeing cdevs.
Notes
Notes:
svn path=/head/; revision=136014
Diffstat (limited to 'sys/kern/kern_conf.c')
| -rw-r--r-- | sys/kern/kern_conf.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sys/kern/kern_conf.c b/sys/kern/kern_conf.c index f5d607757408..3f7bc4467805 100644 --- a/sys/kern/kern_conf.c +++ b/sys/kern/kern_conf.c @@ -98,17 +98,31 @@ dev_ref(struct cdev *dev) } void -dev_rel(struct cdev *dev) +dev_rel(struct vnode *vp) { + struct cdev *dev; + int flag; + dev = vp->v_rdev; + mtx_assert(&devmtx, MA_NOTOWNED); + dev_lock(); + SLIST_REMOVE(&dev->si_hlist, vp, vnode, v_specnext); + dev->si_usecount -= vp->v_usecount; + vp->v_rdev = NULL; dev->si_refcount--; KASSERT(dev->si_refcount >= 0, ("dev_rel(%s) gave negative count", devtoname(dev))); + flag = 0; if (dev->si_devsw == NULL && dev->si_refcount == 0) { LIST_REMOVE(dev, si_list); - freedev(dev); + flag = 1; } + dev_unlock(); + if (flag) + freedev(dev); + return; } + struct cdevsw * dev_refthread(struct cdev *dev) { |